What does Darwin "cower the Earth's" for?

it's the under parts of the car

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

well this isn't a question but if you are asking if it is true or false it is, true.

answer; a splinter party;